This video depicts a historical astronomical observation where Han dynasty astronomers recorded a sunspot crossing the sun's face on May 10th, 28 BC, during the reign of Emperor Cheng, demonstrating early Chinese astronomical documentation of solar phenomena.
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May 10th, 28 BC – A sunspot is observed by Han dynasty astronomers during the reign of Emperor ChengAdded:
Record this precisely. A dark [music] spot crosses the sun's face. Yes, master. The date is the 10th day of May.
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